Aircraft finishes Flashcards
(15 cards)
what are the common types of paint used on aircraft
primers, enamels, lacquers and multipart finishing formulas (epoxies)
what is used with zinc chromate primer if it is too thick and needs t o be thinned
toluene
what are two types of dope used for aircraft finishes
nitrate and butyrate
what is the purpose of zinc chromate primer
it serves as a corrosion resistant covering and base coat for protective topcoats
many of the solvents and thinners used in modern finishing systems are toxic; what health safety precaution should the mechanic observe
some form of respirator or mask must be work when spraying
what are the three methods of applying paint
dipping, brushing and spraying
what paint system is compatible with epoxy topcoats
any paint system in good condition
what is the cause of spray dust
incorrect spray gun setting of air pressure, paint flow, or spray pattern, spray gun being held too far from the surface, material being improperly thinned, or the wrong reducers being used with finish coats
what may cause spray paint sags and runs
applying too much paint to an area or too much reducer in the paint(too thin or incorrect spray gun setting of air paint mixture)
what causes orange peel spray mottle
not enough reducer (too thick) or the wrong type reducer for the ambient temperature or material not uniformly mixed; or forced drying method too quick or too little flash time between coats or ambient temperature is too hot or too cold
what is blushing paint finish
a dull milky haze that appears in a paint finish
what will cause a blushing paint finish
it occurs when moisture is trapped in the paint. Usually due to moisture in the air supply, adverse humidity
what could be the result of applying a coat of dope when the temperature of the dope room is too high
pinholes in the dope film
what areas must be protected from damage when using paint remover/stripper
all window material, vents and static ports, rubber seals and tires and composite components that may be affected by the chemicals
how can a mechanic determine of the control surfaces need to be checked for balance after painting
refer to the manufacturer’s service manual and or contact the manufacturer
